Other observations on wood

Civilisation started with cutting the first tree -and it ends with cutting the last  

Bossard, Holzkimde, Band 2, Zur Biologie, Physik und Chemie des Holzes. Birkhduser Verlag, Basel 1975, p. 261. 

Fengel and G. Wegener, Wood - Chemistry, Ultrastructure, Reactions. De Gruyter, Berlin 1989, pp.613 

Freudenberg and A C. Neish, Constitution and Biosynthesis of Lignin. Springer Verlag, Berlin 1968, p. 129. 

Hausen, Woods Injurious to Human Health. A Manual, de Gru)4er, Berlin 1981, p. 189. 

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